What is the de broglie wavelength of an object with a mass, Ask an Expert

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What is the de Broglie wavelength of an object with a mass of 1.3 kg moving at a speed of 2.3 m/s? (Useful constant: h = 6.63×10-34 Js.)
2.22×10-34 m

**Need help on 2nd part
How many times is this wavelength shorter than the approximate diameter of the Hydrogen atom (1.0 Angstrom)?

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